Optimal Compatibility Designed to fit most hydration bladders, these replacement bite valves are specifically compatible with Packs Hydraulics Reservoirs. Their universal design ensures they work seamlessly with a variety of hydration systems, making them a versatile choice for outdoor enthusiasts. Superior Silicone Quality Made from highquality silicone, these bite valves offer eceptional durability and elasticity. They are completely odorless and free of harmful substances, providing a soft, comfortable bite and ensuring a healthy drinking eperience during your outdoor activities. Easy Installation Replacing your hydration backpack bite valve is easy with these silicone ones. Simply remove the wornout valve and insert the new one without having to make any modifications to your backpacks drinking tube, making it a convenient upgrade for any hydration system. Comprehensive Package Includes four silicone bite valves, complete with inner posts. This ample amount allows for regular replacement, helping to maintain hydration system performance and functionality over multiple adventures. Versatile Use These silicone mouthpiece replacements are designed to fit a wide range of bite valves, including those that are 360 degrees rotatable and have onoff functions. Whether youre cycling, running, hiking, or participating in any other outdoor activity, these are the perfect replacements to help maintain hydration. Color Blue Material Silicone Package Contents 4Pack Bite Valve Replacement Covers The above package contents only, other products are not included. Note Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 13 cm.